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nschapeler committed Jan 2, 2019
1 parent 97ca9a4 commit 0e6fb3006a68cce761f9daaeb40f602779099c1c
Showing with 821 additions and 1 deletion.
  1. +11 −0 .gitignore
  2. +3 −1 README.md
  3. +1 −0 app/.gitignore
  4. +33 −0 app/build.gradle
  5. +21 −0 app/proguard-rules.pro
  6. +26 −0 app/src/androidTest/java/com/web3j_intro/ExampleInstrumentedTest.java
  7. +22 −0 app/src/main/AndroidManifest.xml
  8. +94 −0 app/src/main/java/com/web3j_intro/MainActivity.java
  9. +34 −0 app/src/main/res/drawable-v24/ic_launcher_foreground.xml
  10. +170 −0 app/src/main/res/drawable/ic_launcher_background.xml
  11. +54 −0 app/src/main/res/layout/activity_main.xml
  12. +5 −0 app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml
  13. +5 −0 app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml
  14. BIN app/src/main/res/mipmap-hdpi/ic_launcher.png
  15. BIN app/src/main/res/mipmap-hdpi/ic_launcher_round.png
  16. BIN app/src/main/res/mipmap-mdpi/ic_launcher.png
  17. BIN app/src/main/res/mipmap-mdpi/ic_launcher_round.png
  18. BIN app/src/main/res/mipmap-xhdpi/ic_launcher.png
  19. BIN app/src/main/res/mipmap-xhdpi/ic_launcher_round.png
  20. BIN app/src/main/res/mipmap-xxhdpi/ic_launcher.png
  21. BIN app/src/main/res/mipmap-xxhdpi/ic_launcher_round.png
  22. BIN app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
  23. BIN app/src/main/res/mipmap-xxxhdpi/ic_launcher_round.png
  24. +6 −0 app/src/main/res/values/colors.xml
  25. +3 −0 app/src/main/res/values/strings.xml
  26. +11 −0 app/src/main/res/values/styles.xml
  27. +17 −0 app/src/test/java/com/web3j_intro/ExampleUnitTest.java
  28. +28 −0 build.gradle
  29. +15 −0 gradle.properties
  30. BIN gradle/wrapper/gradle-wrapper.jar
  31. +5 −0 gradle/wrapper/gradle-wrapper.properties
  32. +172 −0 gradlew
  33. +84 −0 gradlew.bat
  34. +1 −0 settings.gradle
@@ -0,0 +1,11 @@
*.iml
.gradle
/local.properties
/.idea/caches/build_file_checksums.ser
/.idea/libraries
/.idea/modules.xml
/.idea/workspace.xml
.DS_Store
/build
/captures
.externalNativeBuild
@@ -1 +1,3 @@
# Ethereum-Android-Intro
# Ethereum-Android-Intro

A quick intro demonstrating working with Ethereum on Android using Infura and Web3j.
@@ -0,0 +1 @@
/build
@@ -0,0 +1,33 @@
apply plugin: 'com.android.application'

android {
compileSdkVersion 28
defaultConfig {
applicationId "com.web3j_intro"
minSdkVersion 24
targetSdkVersion 28
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'org.web3j:core:4.1.0-android'
}
@@ -0,0 +1,21 @@
# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
# http://developer.android.com/guide/developing/tools/proguard.html

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
# public *;
#}

# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable

# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile
@@ -0,0 +1,26 @@
package com.web3j_intro;

import android.content.Context;
import android.support.test.InstrumentationRegistry;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.junit.Assert.*;

/**
* Instrumented test, which will execute on an Android device.
*
* @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
*/
@RunWith(AndroidJUnit4.class)
public class ExampleInstrumentedTest {
@Test
public void useAppContext() {
// Context of the app under test.
Context appContext = InstrumentationRegistry.getTargetContext();

assertEquals("com.web3j_intro", appContext.getPackageName());
}
}
@@ -0,0 +1,22 @@
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.web3j_intro">
<uses-permission android:name="android.permission.INTERNET"/>

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>
@@ -0,0 +1,94 @@
package com.web3j_intro;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import org.web3j.crypto.Credentials;
import org.web3j.crypto.ECKeyPair;
import org.web3j.crypto.WalletUtils;
import org.web3j.protocol.Web3j;
import org.web3j.protocol.core.methods.response.TransactionReceipt;
import org.web3j.protocol.core.methods.response.Web3ClientVersion;
import org.web3j.protocol.http.HttpService;
import org.web3j.tx.Transfer;
import org.web3j.utils.Convert;

import java.io.File;
import java.math.BigDecimal;
import java.security.KeyPairGenerator;

public class MainActivity extends AppCompatActivity {

private Web3j web3;
//FIXME: Add your own password here
private final String password = "medium";
private String walletPath;// = getFilesDir().getPath();
private File walletDir;// = new File(walletPath);

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
walletPath = getFilesDir().getAbsolutePath();
walletDir = new File(walletPath);

}

public void connectToEthNetwork(View v) {
toastAsync("Connecting to Ethereum network...");
// FIXME: Add your own API key here
web3 = Web3j.build(new HttpService("https://rinkeby.infura.io/v3/YOURKEY”));
try {
Web3ClientVersion clientVersion = web3.web3ClientVersion().sendAsync().get();
if(!clientVersion.hasError()){
toastAsync("Connected!");
}
else {
toastAsync(clientVersion.getError().getMessage());
}
} catch (Exception e) {
toastAsync(e.getMessage());
}
}
public void createWallet(View v){
try{
WalletUtils.generateNewWalletFile(password, walletDir);
toastAsync("Wallet generated");
}
catch (Exception e){
toastAsync(e.getMessage());
}
}
public void getAddress(View v){
try {
Credentials credentials = WalletUtils.loadCredentials(password, walletDir);
toastAsync("Your address is " + credentials.getAddress());
}
catch (Exception e){
toastAsync(e.getMessage());
}
}
public void sendTransaction(View v){
try{
Credentials credentials = WalletUtils.loadCredentials(password, walletDir);
TransactionReceipt receipt = Transfer.sendFunds(web3,credentials,"0x31B98D14007bDEe637298086988A0bBd31184523",new BigDecimal(1),Convert.Unit.ETHER).sendAsync().get();
toastAsync("Transaction complete: " +receipt.getTransactionHash());
}
catch (Exception e){
toastAsync(e.getMessage());
}
}
public void toastAsync(String message) {
runOnUiThread(() -> {
Toast.makeText(this, message, Toast.LENGTH_LONG).show();
});
}
}
@@ -0,0 +1,34 @@
<vector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:aapt="http://schemas.android.com/aapt"
android:width="108dp"
android:height="108dp"
android:viewportWidth="108"
android:viewportHeight="108">
<path
android:fillType="evenOdd"
android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z"
android:strokeWidth="1"
android:strokeColor="#00000000">
<aapt:attr name="android:fillColor">
<gradient
android:endX="78.5885"
android:endY="90.9159"
android:startX="48.7653"
android:startY="61.0927"
android:type="linear">
<item
android:color="#44000000"
android:offset="0.0" />
<item
android:color="#00000000"
android:offset="1.0" />
</gradient>
</aapt:attr>
</path>
<path
android:fillColor="#FFFFFF"
android:fillType="nonZero"
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android:strokeWidth="1"
android:strokeColor="#00000000" />
</vector>

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